Q2. How do we convert between measurements made by different instruments?

Further to George’s comment (http://wp.me/p7ffKH-B). This is one of the central questions I would like this working group to resolve. It starts with the simple question: What is #esd? Different people have different ideas about how to extrapolate their data into a 3D object. For example, I calculated ESD for each particle assuming faecal pellets are cylindrical and all other particles are prolate ellipsoids. But is that what everyone does? And how do you cope with aggregates that are made of different things stuck together? For example:

mixed aggregate

Further to that, how do you determine where a particle ends? I suspect most of us use automatic algorithms, but again, it would be important to make sure that we all use the same threshold. When dealing with 3D objects, even a small error in estimated ESD will have a large effect on final volume (e.g. POC content) calculations!

Maybe we can come up with definitions for each device, all of which are internally consistent?

Share your thoughts

Hi all,

I thought it would be good to have a platform, where we can write down ideas and comment on these. For example future directions, updates, definitions, problems, etc.

You can tag your post to help structuring the discussion. For example, use #esd if you want to discuss how to define particle size.

You can also address a particular member using the ‘at’ symbol. For example: ‘@saristar, this is awesome!’

Obviously, this website is not finished yet and will probably only serve as a mockup until we have the final website hosted on the noc server. This will then also include the database search and submission functions.

Until then, I will make anyone interested an admin, so that you can join the discussion, and add and alter the website. We need details for all devices and definitions/recommendations!

Let me know what you think!
Sari